Mercurial > sdl-ios-xcode
annotate src/audio/alsa/SDL_alsa_audio.c @ 1133:609c060fd2a2
The MacOSX Carbon/Cocoa/X11 all in one library patch. Relevant emails:
To: SDL Developers <sdl@libsdl.org>
From: =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb@algonet.se>
Date: Mon, 30 May 2005 23:29:04 +0200
Subject: [SDL] Mac OS X Video Drivers [patch]
I've updated/added the Carbon and X11 video drivers
to the Mac OS X port of SDL 1.2 (the CVS version),
and made the Cocoa driver and runtime *optional*.
The default is still Cocoa, and the "Quartz" driver.
But you can now also use "toolbox" for Carbon, and
"x11" for running with Apple's (or other) X11 server:
export SDL_VIDEODRIVER=x11
export SDL_VIDEO_GL_DRIVER=/usr/X11R6/lib/libGL.dylib
It also checks if the frameworks are available, by a:
#include <Carbon/Carbon.h> or #import <Cocoa/Cocoa.h>
(this should make it configure on plain Darwin as well?)
Here are the new configure targets:
--enable-video-cocoa use Cocoa/Quartz video driver default=yes
--enable-video-carbon use Carbon/QuickDraw video driver default=yes
--enable-video-x11 use X11 video driver default=no
./configure --enable-video-cocoa --enable-video-carbon
--enable-video-x11 \
--x-includes=/usr/X11R6/include --x-libraries=/usr/X11R6/lib
The Carbon version is just an updated version of the old
SDL driver for Mac OS 9, and could probably be improved...
(but it does work, including the Carbon version of SDLmain)
If you disable cocoa, you can run with -framework Carbon only,
and the C version of SDL_main.c. And if you disable carbon too,
you can still use the X11 version which doesn't require SDLmain.
I updated the DrawSprocket version, but did not include it.
(no blitters or VRAM GWorlds etc. available on OS X anyway)
Besides for Mac OS 9, I don't think there's any use for it ?
And note that any performance on Mac OS X equals OpenGL anyway...
You can get "fair" software SDL results on captured CG displays,
but for decent frame rates you need to be using GL for rendering.
Finally, here is the patch itself:
http://www.algonet.se/~afb/SDL-12CVS-macvideo.patch
--anders
PS. It says "video", but as usual it applies to mouse/keyboard too.
------
To: A list for developers using the SDL library <sdl@libsdl.org>
From: =?ISO-8859-1?Q?Anders_F_Bj=F6rklund?= <afb@algonet.se>
Date: Sun, 4 Sep 2005 10:02:15 +0200
Subject: [SDL] Updated Mac patch
Updated the previous Mac patch to disable Carbon by default.
Also "fixed" the SDL.spec again, so that it builds on Darwin.
http://www.algonet.se/~afb/SDL-1.2.9-mac.patch
Also applied fine to SDL12 CVS, when I tried it.
author | Ryan C. Gordon <icculus@icculus.org> |
---|---|
date | Thu, 08 Sep 2005 06:16:14 +0000 |
parents | 41a59de7f2ed |
children | 05d4b93b911e |
rev | line source |
---|---|
0 | 1 /* |
2 SDL - Simple DirectMedia Layer | |
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
765
diff
changeset
|
3 Copyright (C) 1997-2004 Sam Lantinga |
0 | 4 |
5 This library is free software; you can redistribute it and/or | |
6 modify it under the terms of the GNU Library General Public | |
7 License as published by the Free Software Foundation; either | |
8 version 2 of the License, or (at your option) any later version. | |
9 | |
10 This library is distributed in the hope that it will be useful, | |
11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 Library General Public License for more details. | |
14 | |
15 You should have received a copy of the GNU Library General Public | |
16 License along with this library; if not, write to the Free | |
17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | |
19 Sam Lantinga | |
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
20 slouken@libsdl.org |
0 | 21 */ |
22 | |
23 | |
24 | |
25 /* Allow access to a raw mixing buffer */ | |
26 | |
27 #include <stdlib.h> | |
28 #include <stdio.h> | |
29 #include <string.h> | |
30 #include <errno.h> | |
31 #include <unistd.h> | |
32 #include <fcntl.h> | |
33 #include <signal.h> | |
34 #include <sys/types.h> | |
35 #include <sys/time.h> | |
36 | |
37 #include "SDL_audio.h" | |
38 #include "SDL_error.h" | |
39 #include "SDL_audiomem.h" | |
40 #include "SDL_audio_c.h" | |
41 #include "SDL_timer.h" | |
42 #include "SDL_alsa_audio.h" | |
43 | |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
44 #ifdef ALSA_DYNAMIC |
939
c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
865
diff
changeset
|
45 #ifdef USE_DLVSYM |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
46 #define __USE_GNU |
939
c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
865
diff
changeset
|
47 #endif |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
48 #include <dlfcn.h> |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
49 #include "SDL_name.h" |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
50 #include "SDL_loadso.h" |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
51 #else |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
52 #define SDL_NAME(X) X |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
53 #endif |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
54 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
55 |
0 | 56 /* The tag name used by ALSA audio */ |
57 #define DRIVER_NAME "alsa" | |
58 | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
59 /* The default ALSA audio driver */ |
765
4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents:
547
diff
changeset
|
60 #define DEFAULT_DEVICE "default" |
0 | 61 |
62 /* Audio driver functions */ | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
63 static int ALSA_OpenAudio(_THIS, SDL_AudioSpec *spec); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
64 static void ALSA_WaitAudio(_THIS); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
65 static void ALSA_PlayAudio(_THIS); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
66 static Uint8 *ALSA_GetAudioBuf(_THIS); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
67 static void ALSA_CloseAudio(_THIS); |
0 | 68 |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
69 #ifdef ALSA_DYNAMIC |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
70 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
71 static const char *alsa_library = ALSA_DYNAMIC; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
72 static void *alsa_handle = NULL; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
73 static int alsa_loaded = 0; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
74 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
75 static int (*SDL_snd_pcm_open)(snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
76 static int (*SDL_NAME(snd_pcm_open))(snd_pcm_t **pcm, const char *name, snd_pcm_stream_t stream, int mode); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
77 static int (*SDL_NAME(snd_pcm_close))(snd_pcm_t *pcm); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
78 static snd_pcm_sframes_t (*SDL_NAME(snd_pcm_writei))(snd_pcm_t *pcm, const void *buffer, snd_pcm_uframes_t size); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
79 static int (*SDL_NAME(snd_pcm_resume))(snd_pcm_t *pcm); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
80 static int (*SDL_NAME(snd_pcm_prepare))(snd_pcm_t *pcm); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
81 static int (*SDL_NAME(snd_pcm_drain))(snd_pcm_t *pcm); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
82 static const char *(*SDL_NAME(snd_strerror))(int errnum); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
83 static size_t (*SDL_NAME(snd_pcm_hw_params_sizeof))(void); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
84 static int (*SDL_NAME(snd_pcm_hw_params_any))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
85 static int (*SDL_NAME(snd_pcm_hw_params_set_access))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t access); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
86 static int (*SDL_NAME(snd_pcm_hw_params_set_format))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
87 static int (*SDL_NAME(snd_pcm_hw_params_set_channels))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
88 static int (*SDL_NAME(snd_pcm_hw_params_get_channels))(const snd_pcm_hw_params_t *params); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
89 static unsigned int (*SDL_NAME(snd_pcm_hw_params_set_rate_near))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int *dir); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
90 static snd_pcm_uframes_t (*SDL_NAME(snd_pcm_hw_params_set_period_size_near))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int *dir); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
91 static unsigned int (*SDL_NAME(snd_pcm_hw_params_set_periods_near))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int *dir); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
92 static int (*SDL_NAME(snd_pcm_hw_params))(snd_pcm_t *pcm, snd_pcm_hw_params_t *params); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
93 static int (*SDL_NAME(snd_pcm_nonblock))(snd_pcm_t *pcm, int nonblock); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
94 #define snd_pcm_hw_params_sizeof SDL_NAME(snd_pcm_hw_params_sizeof) |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
95 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
96 static struct { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
97 const char *name; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
98 void **func; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
99 } alsa_functions[] = { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
100 { "snd_pcm_open", (void**)&SDL_NAME(snd_pcm_open) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
101 { "snd_pcm_close", (void**)&SDL_NAME(snd_pcm_close) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
102 { "snd_pcm_writei", (void**)&SDL_NAME(snd_pcm_writei) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
103 { "snd_pcm_resume", (void**)&SDL_NAME(snd_pcm_resume) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
104 { "snd_pcm_prepare", (void**)&SDL_NAME(snd_pcm_prepare) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
105 { "snd_pcm_drain", (void**)&SDL_NAME(snd_pcm_drain) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
106 { "snd_strerror", (void**)&SDL_NAME(snd_strerror) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
107 { "snd_pcm_hw_params_sizeof", (void**)&SDL_NAME(snd_pcm_hw_params_sizeof) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
108 { "snd_pcm_hw_params_any", (void**)&SDL_NAME(snd_pcm_hw_params_any) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
109 { "snd_pcm_hw_params_set_access", (void**)&SDL_NAME(snd_pcm_hw_params_set_access) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
110 { "snd_pcm_hw_params_set_format", (void**)&SDL_NAME(snd_pcm_hw_params_set_format) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
111 { "snd_pcm_hw_params_set_channels", (void**)&SDL_NAME(snd_pcm_hw_params_set_channels) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
112 { "snd_pcm_hw_params_get_channels", (void**)&SDL_NAME(snd_pcm_hw_params_get_channels) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
113 { "snd_pcm_hw_params_set_rate_near", (void**)&SDL_NAME(snd_pcm_hw_params_set_rate_near) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
114 { "snd_pcm_hw_params_set_period_size_near", (void**)&SDL_NAME(snd_pcm_hw_params_set_period_size_near) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
115 { "snd_pcm_hw_params_set_periods_near", (void**)&SDL_NAME(snd_pcm_hw_params_set_periods_near) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
116 { "snd_pcm_hw_params", (void**)&SDL_NAME(snd_pcm_hw_params) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
117 { "snd_pcm_nonblock", (void**)&SDL_NAME(snd_pcm_nonblock) }, |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
118 }; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
119 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
120 static void UnloadALSALibrary(void) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
121 if (alsa_loaded) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
122 /* SDL_UnloadObject(alsa_handle);*/ |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
123 dlclose(alsa_handle); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
124 alsa_handle = NULL; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
125 alsa_loaded = 0; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
126 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
127 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
128 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
129 static int LoadALSALibrary(void) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
130 int i, retval = -1; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
131 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
132 /* alsa_handle = SDL_LoadObject(alsa_library);*/ |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
133 alsa_handle = dlopen(alsa_library,RTLD_NOW); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
134 if (alsa_handle) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
135 alsa_loaded = 1; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
136 retval = 0; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
137 for (i = 0; i < SDL_TABLESIZE(alsa_functions); i++) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
138 /* *alsa_functions[i].func = SDL_LoadFunction(alsa_handle,alsa_functions[i].name);*/ |
939
c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
865
diff
changeset
|
139 #ifdef USE_DLVSYM |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
140 *alsa_functions[i].func = dlvsym(alsa_handle,alsa_functions[i].name,"ALSA_0.9"); |
939
c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
865
diff
changeset
|
141 if (!*alsa_functions[i].func) |
c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
865
diff
changeset
|
142 #endif |
c7c04f811994
Date: Tue, 01 Jun 2004 15:27:44 +0300
Sam Lantinga <slouken@libsdl.org>
parents:
865
diff
changeset
|
143 *alsa_functions[i].func = dlsym(alsa_handle,alsa_functions[i].name); |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
144 if (!*alsa_functions[i].func) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
145 retval = -1; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
146 UnloadALSALibrary(); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
147 break; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
148 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
149 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
150 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
151 return retval; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
152 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
153 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
154 #else |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
155 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
156 static void UnloadALSALibrary(void) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
157 return; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
158 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
159 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
160 static int LoadALSALibrary(void) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
161 return 0; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
162 } |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
163 |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
164 #endif /* ALSA_DYNAMIC */ |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
165 |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
166 static const char *get_audio_device(int channels) |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
167 { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
168 const char *device; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
169 |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
170 device = getenv("AUDIODEV"); /* Is there a standard variable name? */ |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
171 if ( device == NULL ) { |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
172 if (channels == 6) device = "surround51"; |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
173 else if (channels == 4) device = "surround40"; |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
174 else device = DEFAULT_DEVICE; |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
175 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
176 return device; |
0 | 177 } |
178 | |
179 /* Audio driver bootstrap functions */ | |
180 | |
181 static int Audio_Available(void) | |
182 { | |
183 int available; | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
184 int status; |
0 | 185 snd_pcm_t *handle; |
186 | |
187 available = 0; | |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
188 if (LoadALSALibrary() < 0) { |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
189 return available; |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
190 } |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
191 status = SDL_NAME(snd_pcm_open)(&handle, get_audio_device(2), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
192 if ( status >= 0 ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
193 available = 1; |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
194 SDL_NAME(snd_pcm_close)(handle); |
0 | 195 } |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
196 UnloadALSALibrary(); |
0 | 197 return(available); |
198 } | |
199 | |
200 static void Audio_DeleteDevice(SDL_AudioDevice *device) | |
201 { | |
202 free(device->hidden); | |
203 free(device); | |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
204 UnloadALSALibrary(); |
0 | 205 } |
206 | |
207 static SDL_AudioDevice *Audio_CreateDevice(int devindex) | |
208 { | |
209 SDL_AudioDevice *this; | |
210 | |
211 /* Initialize all variables that we clean on shutdown */ | |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
212 LoadALSALibrary(); |
0 | 213 this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice)); |
214 if ( this ) { | |
215 memset(this, 0, (sizeof *this)); | |
216 this->hidden = (struct SDL_PrivateAudioData *) | |
217 malloc((sizeof *this->hidden)); | |
218 } | |
219 if ( (this == NULL) || (this->hidden == NULL) ) { | |
220 SDL_OutOfMemory(); | |
221 if ( this ) { | |
222 free(this); | |
223 } | |
224 return(0); | |
225 } | |
226 memset(this->hidden, 0, (sizeof *this->hidden)); | |
227 | |
228 /* Set the function pointers */ | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
229 this->OpenAudio = ALSA_OpenAudio; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
230 this->WaitAudio = ALSA_WaitAudio; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
231 this->PlayAudio = ALSA_PlayAudio; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
232 this->GetAudioBuf = ALSA_GetAudioBuf; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
233 this->CloseAudio = ALSA_CloseAudio; |
0 | 234 |
235 this->free = Audio_DeleteDevice; | |
236 | |
237 return this; | |
238 } | |
239 | |
240 AudioBootStrap ALSA_bootstrap = { | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
241 DRIVER_NAME, "ALSA 0.9 PCM audio", |
0 | 242 Audio_Available, Audio_CreateDevice |
243 }; | |
244 | |
245 /* This function waits until it is possible to write a full sound buffer */ | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
246 static void ALSA_WaitAudio(_THIS) |
0 | 247 { |
248 /* Check to see if the thread-parent process is still alive */ | |
249 { static int cnt = 0; | |
250 /* Note that this only works with thread implementations | |
251 that use a different process id for each thread. | |
252 */ | |
253 if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */ | |
254 if ( kill(parent, 0) < 0 ) { | |
255 this->enabled = 0; | |
256 } | |
257 } | |
258 } | |
259 } | |
260 | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
261 static void ALSA_PlayAudio(_THIS) |
0 | 262 { |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
263 int status; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
264 int sample_len; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
265 signed short *sample_buf; |
765
4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents:
547
diff
changeset
|
266 |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
267 sample_len = this->spec.samples; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
268 sample_buf = (signed short *)mixbuf; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
269 while ( sample_len > 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
270 status = SDL_NAME(snd_pcm_writei)(pcm_handle, sample_buf, sample_len); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
271 if ( status < 0 ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
272 if ( status == -EAGAIN ) { |
765
4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents:
547
diff
changeset
|
273 SDL_Delay(1); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
274 continue; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
275 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
276 if ( status == -ESTRPIPE ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
277 do { |
765
4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents:
547
diff
changeset
|
278 SDL_Delay(1); |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
279 status = SDL_NAME(snd_pcm_resume)(pcm_handle); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
280 } while ( status == -EAGAIN ); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
281 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
282 if ( status < 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
283 status = SDL_NAME(snd_pcm_prepare)(pcm_handle); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
284 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
285 if ( status < 0 ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
286 /* Hmm, not much we can do - abort */ |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
287 this->enabled = 0; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
288 return; |
0 | 289 } |
356
a1e54d1ba16f
*** empty log message ***
Sam Lantinga <slouken@libsdl.org>
parents:
354
diff
changeset
|
290 continue; |
0 | 291 } |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
292 sample_buf += status * this->spec.channels; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
293 sample_len -= status; |
0 | 294 } |
295 } | |
296 | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
297 static Uint8 *ALSA_GetAudioBuf(_THIS) |
0 | 298 { |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
299 return(mixbuf); |
0 | 300 } |
301 | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
302 static void ALSA_CloseAudio(_THIS) |
0 | 303 { |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
304 if ( mixbuf != NULL ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
305 SDL_FreeAudioMem(mixbuf); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
306 mixbuf = NULL; |
0 | 307 } |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
308 if ( pcm_handle ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
309 SDL_NAME(snd_pcm_drain)(pcm_handle); |
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
310 SDL_NAME(snd_pcm_close)(pcm_handle); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
311 pcm_handle = NULL; |
0 | 312 } |
313 } | |
314 | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
315 static int ALSA_OpenAudio(_THIS, SDL_AudioSpec *spec) |
0 | 316 { |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
317 int status; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
318 snd_pcm_hw_params_t *params; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
319 snd_pcm_format_t format; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
320 snd_pcm_uframes_t frames; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
321 Uint16 test_format; |
0 | 322 |
323 /* Open the audio device */ | |
942
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
324 /* Name of device should depend on # channels in spec */ |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
325 status = SDL_NAME(snd_pcm_open)(&pcm_handle, get_audio_device(spec->channels), SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK); |
41a59de7f2ed
Here are patches for SDL12 and SDL_mixer for 4 or 6 channel
Sam Lantinga <slouken@libsdl.org>
parents:
939
diff
changeset
|
326 |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
327 if ( status < 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
328 SDL_SetError("Couldn't open audio device: %s", SDL_NAME(snd_strerror)(status)); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
329 return(-1); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
330 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
331 |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
332 /* Figure out what the hardware is capable of */ |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
333 snd_pcm_hw_params_alloca(¶ms); |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
334 status = SDL_NAME(snd_pcm_hw_params_any)(pcm_handle, params); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
335 if ( status < 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
336 SDL_SetError("Couldn't get hardware config: %s", SDL_NAME(snd_strerror)(status)); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
337 ALSA_CloseAudio(this); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
338 return(-1); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
339 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
340 |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
341 /* SDL only uses interleaved sample output */ |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
342 status = SDL_NAME(snd_pcm_hw_params_set_access)(pcm_handle, params, SND_PCM_ACCESS_RW_INTERLEAVED); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
343 if ( status < 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
344 SDL_SetError("Couldn't set interleaved access: %s", SDL_NAME(snd_strerror)(status)); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
345 ALSA_CloseAudio(this); |
0 | 346 return(-1); |
347 } | |
348 | |
349 /* Try for a closest match on audio format */ | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
350 status = -1; |
0 | 351 for ( test_format = SDL_FirstAudioFormat(spec->format); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
352 test_format && (status < 0); ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
353 switch ( test_format ) { |
0 | 354 case AUDIO_U8: |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
355 format = SND_PCM_FORMAT_U8; |
0 | 356 break; |
357 case AUDIO_S8: | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
358 format = SND_PCM_FORMAT_S8; |
0 | 359 break; |
360 case AUDIO_S16LSB: | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
361 format = SND_PCM_FORMAT_S16_LE; |
0 | 362 break; |
363 case AUDIO_S16MSB: | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
364 format = SND_PCM_FORMAT_S16_BE; |
0 | 365 break; |
366 case AUDIO_U16LSB: | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
367 format = SND_PCM_FORMAT_U16_LE; |
0 | 368 break; |
369 case AUDIO_U16MSB: | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
370 format = SND_PCM_FORMAT_U16_BE; |
0 | 371 break; |
372 default: | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
373 format = 0; |
0 | 374 break; |
375 } | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
376 if ( format != 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
377 status = SDL_NAME(snd_pcm_hw_params_set_format)(pcm_handle, params, format); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
378 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
379 if ( status < 0 ) { |
0 | 380 test_format = SDL_NextAudioFormat(); |
381 } | |
382 } | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
383 if ( status < 0 ) { |
0 | 384 SDL_SetError("Couldn't find any hardware audio formats"); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
385 ALSA_CloseAudio(this); |
0 | 386 return(-1); |
387 } | |
388 spec->format = test_format; | |
389 | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
390 /* Set the number of channels */ |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
391 status = SDL_NAME(snd_pcm_hw_params_set_channels)(pcm_handle, params, spec->channels); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
392 if ( status < 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
393 status = SDL_NAME(snd_pcm_hw_params_get_channels)(params); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
394 if ( (status <= 0) || (status > 2) ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
395 SDL_SetError("Couldn't set audio channels"); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
396 ALSA_CloseAudio(this); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
397 return(-1); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
398 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
399 spec->channels = status; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
400 } |
0 | 401 |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
402 /* Set the audio rate */ |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
403 status = SDL_NAME(snd_pcm_hw_params_set_rate_near)(pcm_handle, params, spec->freq, NULL); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
404 if ( status < 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
405 SDL_SetError("Couldn't set audio frequency: %s", SDL_NAME(snd_strerror)(status)); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
406 ALSA_CloseAudio(this); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
407 return(-1); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
408 } |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
409 spec->freq = status; |
0 | 410 |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
411 /* Set the buffer size, in samples */ |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
412 frames = spec->samples; |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
413 frames = SDL_NAME(snd_pcm_hw_params_set_period_size_near)(pcm_handle, params, frames, NULL); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
414 spec->samples = frames; |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
415 SDL_NAME(snd_pcm_hw_params_set_periods_near)(pcm_handle, params, 2, NULL); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
416 |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
417 /* "set" the hardware with the desired parameters */ |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
418 status = SDL_NAME(snd_pcm_hw_params)(pcm_handle, params); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
419 if ( status < 0 ) { |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
420 SDL_SetError("Couldn't set audio parameters: %s", SDL_NAME(snd_strerror)(status)); |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
421 ALSA_CloseAudio(this); |
0 | 422 return(-1); |
423 } | |
424 | |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
425 /* Calculate the final parameters for this audio specification */ |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
426 SDL_CalculateAudioSpec(spec); |
0 | 427 |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
428 /* Allocate mixing buffer */ |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
429 mixlen = spec->size; |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
430 mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
431 if ( mixbuf == NULL ) { |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
432 ALSA_CloseAudio(this); |
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
433 return(-1); |
0 | 434 } |
354
30935e76acb5
Updated ALSA audio support for ALSA 0.9
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
435 memset(mixbuf, spec->silence, spec->size); |
0 | 436 |
437 /* Get the parent process id (we're the parent of the audio thread) */ | |
438 parent = getpid(); | |
439 | |
765
4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents:
547
diff
changeset
|
440 /* Switch to blocking mode for playback */ |
865
92615154bb68
Date: Sun, 29 Feb 2004 15:14:22 +0200
Sam Lantinga <slouken@libsdl.org>
parents:
769
diff
changeset
|
441 SDL_NAME(snd_pcm_nonblock)(pcm_handle, 0); |
765
4c2ba6161939
Editors Note: The original patch was modified to use SDL_Delay() instead of
Sam Lantinga <slouken@libsdl.org>
parents:
547
diff
changeset
|
442 |
0 | 443 /* We're ready to rock and roll. :-) */ |
444 return(0); | |
445 } |